Cutter-holder.



R. G. BRACKETT.

GUTTER HOLDER.

APPLIcATIoN'rILED mxo. 4, 191s.

1,131,818, Patented Mar.16,1v915.

ZM 05j *l* Jim/abt a pnirnn srnrns rne'rnnr ernten.

ROBERT G. BRACKETT, OF ROCHESTER, NEW YORK.

CUTTER-HOLDER.

LSLSS.

T0 all whom t may concern Be it known that I, ROBERT Gr. BRACKETT. of Rochester, in the county of Monroe and State of New York, have invented certain new and useful improvements in Cutter- Holders; and I do hereby declare the following to be a full, clear, and exact description of the same, reference being had to the accompanying drawings, forming a part of this specification, and to the referencenumerals marked thereon.

My invention relates to tool or cutter holders, and it has a more particular bearing upon edge working machinery involving devices for holding blades and cutters such as are employed in shoe manufacture, as for eX- ample sole and heel trimmers, and it has for its object to provide asimple construction that will enable the operator to readily hold a tool while it is being ground or sharpened.

A further object of my invention consists in the provision of a novel construction whereby the tool can be efliciently held and operated in proper relation to the edge engaging wheel.

A further purpose of the invention consists in constructing the device in such a manner as to facilitate the removal of one ltool and the insertion of another, thus resulting in a saving of considerable time where a large number are to be operated on.

To these and other ends the invention consists in certain improvements and combinations of parts all as will be hereinafter more fully described, the novel features being pointed out in the claims at the end of the specification.

In the drawings: Figure l is a perspective view, showing an embodiment of my invention, with a tool inl position, engaging a grinder which appears partially in dotted lines; Fig. 2 is a side elevation of the end of one of the gripping arms, with the edge gage in operative relation, and Fig. 3 is a sectional view on the line 3 3 of Fig. 1.

Similar reference numerals throughout the several figures indicate the same parts.

In grinding or otherwise sharpening the edges of heel and sole trimmers and similar blades or cutters, it is a dicult matter' to maintain the blade in its proper relation to the edge wheel, so as to treat every portion of the edge alike and at the same time obtain a blade having the desired width throughout. In many instances, these blades are held by hand for sharpening, although va- Speccation of Letters Patent.

Application filed December 4, 1913.

Patented Mar. i6, i915.-

senai No. 804,649.

rious devices have been tried for retaining the blades and affording a convenient holder during the sharpening operation, and it is my purpose to improve the construction of this type of device, so that the blade can readily be moved back and forth laterally of the edge engaging wheel, and the operator can secure a more perfect control over the cutter at every stage of the operation. lVith this in view, l have devised a construe tion which is illustrated in the present embodiment, and which preferably comprises an integral strip of stiff, spring metal bent laterally upon itself so as to form a U- shaped member comprising a base portion l and gripping arms 2 and 3. By forming the gripping arms from a. single strip of metal in the manner set forth, a spring action 1s constantly exerted upon each arm tending to separate them or move them away from each other, and this enables a blade to be removed very quickly from the holder when the sharpening operation is completed, by

ierely releasing the hand which is holding the arms in engagement with the tool, and permitting the latter to drop out. lt will be Y understood that during the sharpening opel ation, the arms are in the position shown in Fig. l being held there by a slight pressure of the hand from each side, but when in normal released position, they are spread somewhat, depending upon the resiliency of the metal.

in order to hold the blade properly, l preferably bend the arms 2 and 3 longitudinally upon themselves at the encs, as designated at 4 and 5, forming sockets in which are positioned the removable and adjustable curved jaws 6, the latter being held in place upon the arms by suitable attaching screws 7 secured by the thumb nuts 8. The jaws 6 are curved so as to engage the correspondingly curved slots or recesses 9 which are formed in the edges of the cutters, and the position of the jaws can be adjusted with relation to the gripping arms, so as to secure just the proper engagement with the tool.

If no other support for the tool is provided eXcept the gripping arms, it becomes necessary to hold them quite tightly against the tool, and in order to obviate this and also to prevent any possibility of the tool slipping within the holder, l provide a support for the base of the blade, making such support in the form of an adjustable gage.

To this end, I preferably mount a bracket 10 upon the arm 3, securing it rigidly thereto in any desirable manner. The bracket 10 is provided with a threaded opening to receive the adjustable gage in the form of a post 11, carrying the head l2 at its upper end, arranged for engagement with the base of the tool as shown in Fig. l.

13 is a spring attached to the bracket l0, and arranged to engage .the post 1l, so as to hold the latter against accidental turning.

rIhe head l2 is milled around its outer edge, and can readily be adjusted to accommodate cutters of different widths, and after once adjusting the gage, it serves to determine the width of the blades to be ground.

In operation, the tool is inserted until it rests upon the adjustable gage 12,.and is then ground until its edge is adjacent to a second gage, mounted upon one of the gripping arms. In the present instance, the last mentioned gage is indicated at 14,1being adjustably held in position on the arm 3 by means of the thumb nut which also holds the corresponding jaw. In order to afford a convenient means for moving the tool back and forth upon the edge engaging wheel, I attach to thebase l of the holder, a curved bearing designated at 15, and adapted to rest in a correspondingly curved socket in the support lwvhich may be adjustably secured upon the table 17.

It will be understood that while I have disclosed a preferred embodiment of my improvement, I am not limited to the particular construction shown and described, since this may be modified as to various details., without departing from the essential features of the invention as comprehended in the claims hereinafter.

I claim as my invention:

l. A tool holder embodying an integral strip of metal bent upon itself and forming a pair of oppositely arranged gripping arms normally tending to move. away from each other.

2. A tool holder embodying an integral strip ,of metal bent laterally uponitself and forming a pair of oppositely arranged gripping arms, the strip being bent longitudinally upon itself at the ends and forming jaw engaging portions, and removable jaws held in said jaw engaging portions.

3. A tool holder embodying a pair of opadjustably mounted on one o f the arms and.

adapted to engage the base of a tool.

5. A tool holder embodying a-pair of gripping arms normally tending to move away from each other, and a gage adjust.

ably mounted on one of the arms and adapted to engage the base of a tool. Y

V6. A tool holder embodying an integral strip of metal bent upon itself and forming a pair of oppositely arranged gripping arms normally tending to move away from each other and a gage adjustably mounted on one of the arms and adapted to engage the base of Va tool.

7 A tool holder embodying a pair of oppositely arranged gripping arms, and curved jaws carried by said gripping arms.

8. Atool holder embodying a pair of op positely arranged gripping arms normally tending to move away from each other, and.

curved jaws carried by said gripping arms. Y 9.A tool holder embodying an integral strip of metal bent upon itself and forming a pair of oppositely arranged gripping arms Y normally tending tomove away from each other, and curved jaws carried by said gripping arms.

ROBERT G. BRACKETT;

Witnesses:

H. E. STONEBRAKER, RUSSELL B. GRIFFITH.

Copies of this patent may lbe obtained for ve cents each, by addressing the Commissioner of IEateuts,V

. Washington, .'D. C.

soY 

